Yellow logo
Title as seen on the Disney+ streaming service.
Used on thumbnails for promotional videos on YouTube. 
Title cards
Title card, 1990 (Season 1, Episodes 2-13)
Title card, 1990 (Season 2 Episode 1)
Title card, 1990–2009 (Seasons 2-20)
Title card, 2009–present (Seasons 20-present)
Commercials
Used for commercial breaks during Simpsons Roasting Over an Open Fire (S1, E1) (Fox United States, December 1989)
Logo used in promos
Ads on VHS videos (circa. 2000)
Merchandise
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Merchandise logo used for the very first Simpsons products (early 1990’s)
Current merchandise logo